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Special Steel

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Special Steel

Introduction
Analysis
Carbon0.35-0.45%Chromium1.80-2.00%
Manganese1.40-1.60%Molybdenum0.15-0.25%
Sulphur

0.05-0.10%

Silicon0.30-0.50%
Phosphorous0.03% max
Applications

1.2312 tool steel is ideally suited for the production of moulds where improved machinability is required. Typical applications include die holders, zinc die casting dies, backers, bolsters and injection moulds. The versatility of this plastic mould tool steel with its high tensile characteristics enables uses for a variety of other applications such as shafts and wear strips

Forging

Heat slowly, allowing sufficient time for the steel to become heated through. Begin forging at 1050°C. Do not forge below 930°C reheating if necessary. After forging, cool very slowly.

Stress Relieving

When dies are heavily machined, we recommend stabilising just before finish machining in order to relieve machining strains. Heat to 460-500°C. Soak well and allow to cool in the air.

Annealing

Heat uniformly to 710-740°C. Soak well, cool slowly in the furnace.

Hardening

Heat uniformly to 830-870°C until heated through. Quench in oil.

Tempering

Heat uniformly and soak at the tempering temperature for at least one hour per 25mm of section. Allow to cool in still air.


Temperature [°C]100200300400500600
Hardness [HRc]515048464236
Tensile [N/mm]173016701570148013301140
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